Internal combustion engine



Sept. 6; 1932. LE HORMNG 1,875,620

INTERNAL COMBUSTION ENGINE Original Filed April 18, 1921 Patented Sept. 6, 1932 UNITED STATES.

PATENT OFFICE many LE van noamne, or wa'uxnsna; wrsconsm, assrenon T wauxnsna moron COMPANY, or wauxasna, Wisconsin, a CORPORATION OF-WISGONSIN INTERNAL couaus'rron ENGINE Original application. filed April 18, 1921, Serial 110. 482187. Patent No. 1,729,972, dated October 1, 1929. Divided and this application filed September 28, 1929. Serial- No. 395,784.

My invention relates to internal combustion engines, and is particularly concerned with the combustion chamber.

This application is divisional of my copending application, Serial No. 462,187, filed April 18,1921, which has matured into Patent No. 1,729,972, issued October 1, 1929, wherein I have set forth improved cylinderhead constructions forimproving the thermal efficiency. and power of the engine. In that case the claim is directed to an Otto-cycle L-head en-.

gine -in -which the combustion chamber is bounded by concave surfaces which merge with curved surfaces of a side pocket in which thevalves and ignitionmeans are disposed.

In said parent application I also disclosed a construction of cylinder head having a web or bafile therein between the exhaust valve and the cylinder bore. and adapted to direct themcoming fuel mixture into the combustion chamber substantially tangentially to the looking in the direction indicated by the arrows; and

Figure 3 is a vertical sectional view taken on the planes of the line 3-3 of Figure 1, and looking in the direction indicated by the arrows.

In the drawing, the cylinder block 22 provides the cylinder, in which the piston 18 opcrates, and combustible mixture intake and burned gas outlet passages controlled by the intake valve 12 and exhaust valve 14, respectively.- The head 10 overlies the cylinder and passages, as shown,providing the main combustion chambers over the piston, bounded by the complementary concave surfaces 15 and 20, and the side pocket in which the valves operate.

The head 10 is provided with the downwardly projectingweb or bafiie 30 which lies between the cylinder and the exhaust valve, extending from one side of the combustion chamber but only part way across, leaving the opening 13 directly between the intake passage and the cylinder. The web or baflie 30 extends downwardly to' the base of the head, thus forming a wall between the exhaust valve and'the cylinder, while the other side of the combustion chamber remains in direct open "communication with the intake passage. The dotted.' arrows Y show the course of the incoming combustible mixture.

As clearly illustrated in Figures 1 and 3, the wall or root of the head" which overlies the valve passages is curved inwardly and downwardlyso as to provide the relatively restricted o ning 13, which opens into the cylinder sustantially tangentially thereof. The sparkplug is preferably placed in the position shown by the threaded opening X.

I claim: L In'an L -head internal combustion engine, a cylinder block having a cylinder bore therein, a piston reciprocating in said cylinder, combustible gas inlet and burned-gas outlet passages formed in said block and terminating similarly adjacent the end of said bore, a headlying over said bore and said inlet; and outlet passages, said'head. having a recess formed therein and lying over said inlet and outlet passages and said bore, a baflie in said recess lying between said bore andisaid outlet passage, valves for said inlet and outlet passages, and spark ignition means in said recess.

2.'In an'L-head internal combustion engine, a cylinder block having a cylinder bore therein, a piston reciprocating in said cylinder, combustible gas inlet and burned gas outlet passages formed in said block and terminating similarly adjacent the end of said bore, a head lying over said bore and said inlet and outlet passages,said head having a recess formed therein and'lyin over said inlet 0nd outlet passages and sai bore, a bafile in said recess depending from said head disposed between said bore and said outlet passage, said baflle coacting with and abutting said cylinder block, valves for said inlet and outlet passages, and spark ignition 5 means in said recess.

3. In an internal combustion engine, :1 cylinder and intake and exhaust valves, the axes of which are disposed in triangular relation, a chamber over said cylinder and intake and exhaust valves, and a baflie interposed between the portion of said chamber over said 0 linder and the exhaust valve.

4. 11 an L-head internal combustion engine, a cylinder block havin a cylinder bore 15 therein and combustible gas inlet and burned gas outlet passages termlnating ad'acent one end of the bore and adj aoent one si e thereof, a head overlyin said bore and provided with a pocket overlylng said passages, valves con trolling said passages, a bafiie interposed between one of the valves and the cylinder bore, there being an o ening between said pocket and the bore ad acent the other valve and disposed substantially tangentially of the cylinder bgre, and a piston operating in the cyl inder bore. ,r

In an L-head internal combustion en- 1 gine, a cylinder block havin a cylinder bore therein and combustible gas inlet and burned gas outlet passages terminating adjacent one end of' the bore and adjacent one side thereof, a head overlying said bore and provided with a pocket overyling said passages, valves controlling said passages, a baflie inter osed between one of the valves and the cylinder bore, there being an opening between said pocket and the bore adjacent the other valve, and a piston operating in the cylinder bore.

6. In an L-head internal combustion engine,'a cylinder block having a cylinder boretherein and combustible gas inlet and burned gas outlet passages terminating ad'acent one end of the bore and adjacent one si e thereof,

a a head overlying said bore and provided with a pocket overlymg said passages, valves controllin said passages, the portion of the roof 0 the pocket overl g one of the valves bein curved downward l? and inwardly with relat1on to the cylinder bore, and a piston operating in the bore, there be ng an opening establishing communication between the valve pocket and the bore. In witness whereof, I hereunto subscribe my name this 25th day of Sept. 1929.

HARRY LE VAN HfORNING; 

